* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol',
    'Noto Color Emoji';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #f0f2f5;
}

#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.title {
  text-align: center;
  margin-bottom: 2rem;
  color: #1890ff;
}

.input-group {
  margin-bottom: 1.5rem;
}

.result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 4px;
}

.result-correct {
  background-color: #f6ffed;
  border: 1px solid #b7eb8f;
}

.result-wrong {
  background-color: #fff2f0;
  border: 1px solid #ffccc7;
}